The most common and most likely answer to this crossword clue is the 6 letter word FILTHY
F
I
L
T
H
Y
More clues leading to the result FILTHY
- Sooty, topless with fly undone
- Despicable file they have finally redacted twice
- Rotten to hit fly carelessly
- Offensive as the rich can be!
- Endless record on your old foul
- Dirty father in law teases hot Yankee at first
- Nasty crowd — mostly they suck energy out
- Awkwardly lift hubby’s coat that’s dirty
- Dirty newspaper I left filling hotel yard
- Shortened career over your foul
Buddy explains!

The straight part
We know that "Nasty" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case nasty = filthy.The cryptic/wordplay part
In cryptic crossword there's often an wordplay/cryptic part as well.This part involves a more complex hint, such as an anagram, homophone, hidden word, etc.
Sadly, We don't have an explanation for this specific crossword clue yet.
What does FILTHY mean?
FILTHY verb- To make very dirty; to cover in filth.
- Covered with filth; very dirty.
- Obscene or offensive.
- Very unpleasant or disagreeable.